Multilingual WP

mlwp.php

<?php
/**
 * @package Multilingual WP
 * @version 1.0
 */
/*
Plugin Name: Multilingual WP
Plugin URI: http://saiul.im/
Description: Multilingual For WordPress. This Plugin Based on Shortcode. (It's a Beta)
Author: Saiful Islam
Version: 1.0
Author URI: http://saiul.im/
*/

function languageSwitcher( $query ) {
    	if(!isset($_COOKIE['mlang']))
    	{
    		setcookie('mlang', 'en', strtotime('+1 day'));
    		wp_redirect( $_SERVER['HTTP_REFERER'] );
    	}
    	if(isset($_GET['lang']))
    	{
    		setcookie('mlang', $_GET['lang'], strtotime('+1 day'));
    		wp_redirect( $_SERVER['HTTP_REFERER'] );
    	}

    	
}
add_action( 'pre_get_posts', 'languageSwitcher' );

function current_page_url() {
	$pageURL = 'http';
	if( isset($_SERVER["HTTPS"]) ) {
		if ($_SERVER["HTTPS"] == "on") {$pageURL .= "s";}
	}
	$pageURL .= "://";
	if ($_SERVER["SERVER_PORT"] != "80") {
		$pageURL .= $_SERVER["SERVER_NAME"].":".$_SERVER["SERVER_PORT"].$_SERVER["REQUEST_URI"];
	} else {
		$pageURL .= $_SERVER["SERVER_NAME"].$_SERVER["REQUEST_URI"];
	}
	return $pageURL;
}


function new_nav_menu_items($items) {
	$url = current_page_url();
	$en = (preg_match("/\?/", $url))? $url.'&lang=en' : $url.'?lang=en';
	$bn = (preg_match("/\?/", $url))? $url.'&lang=bn' : $url.'?lang=bn';
    $homelink = '<li class="bn"><a href="' . $bn . '">' . __('BN') . '</a></li>';
    $homelink .= '<li class="en"><a href="' . $en . '">' . __('EN') . '</a></li>';
    $items =  $items.$homelink;
    return $items;
}
add_filter( 'wp_nav_menu_items', 'new_nav_menu_items' );

function mlangDisplay( $atts , $content = null ) {

	extract( shortcode_atts(
		array(
			'lang' => 'en',
		), $atts )
	);
	if($_COOKIE['mlang']==$atts['lang'])
	{
		echo $content;
	}
	
	
}
add_shortcode( 'mlang', 'mlangDisplay' );
?>